Tackle to support scaffolds or similar devices



Nqv. 19, 1929. M. A. SERRA Y PEREZ 1,736,723

TACKLE To SUPPORT, SCAFFOLDS OR SIMILAR DEVICES- Original Filed Sept.10. 1926 2 Sheets-Sheer l 1 I N VEN TOR. 1,4. 86 rra 3 Pa 762 ATTORNEYSNov. 19, 1929. M. A. SERRA Y PE REZ 1,736,723

TACKLE TO SUPPORT SCAFFOLDS OR SIMILAR DEVICES Original Filed Sept".'10, 1926 2 Sheets-Sheet 2 w '2 y w a J INVENTORJ /'4. x7. Serra 782192, BY

I WWI Kiwi A TTORNEY6 Patented Nov. 19, 1929 i V I i UNITED STATESPATENT FFEQE MANUEL AURELIO SERRA Y PEREZ, OF HABANA, CUBA.

TACKLE TO SUPPORT SCAFFOLDS R SIMILAR DEVICES Application filedSeptember 10, 1926, Serial No. 134,740, and in Cuba June 22, 1926.Renewed October 3, 1929.

This invention refers to scaffold supports The ends of said shafts endin universal or similar devices, and has for its main objoints 15 forcoupling by means of a horiject, to provide a device of this kind, whichzont-al shaft 16 ending also in like joints 16. when used in working ona building, permits As explained, it will be understood that a theworkman himself who is standing on the Workman on the platform 1 of thescaffold, 50 scaffold to control, at will, the greater or lesser canregulate the greater or lesser heights of heights of same regarding theground, by a same regarding the ground, by operating slight efiort, andwithout the least danger the chain 14, thereby transmitting the moveofaccident to himself or fellow workmen. ment to the shaft 3 by the gearand worm 10 One advantage of this invention, is that the 11 and wind orunwind the ropes 8 and 9, on 5 device may be suited to long lines ofscafioldthe drums 6 and 7, by which the bracket 2 and ing, which makesit specially useful in the the scaffold 1 are raised or lowered,accordlargest building works. Other objects and ingly; advantages willbe found in the course of It is obvious that within the principles ofthese specifications, with the aid of the figconstruction beforeexplained, many modifio ures in the attached drawings, specially bycations may be made without departing from those persons who are expertsin the art to the essential idea of the invention, which is as whichthis invention pertains. claimed in the following claims:

In the drawings: Claims: Fig. 1, is a fragmentary, front elevation, 1. Acable-suspended scaffold support inshowing sectioned parts of theinvention, eluding a shaft, a pair of cable drums fixed Fig. 2, is avertical section according to thereon, a yoke hung from the shaft andlines 22 of Fig. 1. adapted. to cradle one end of a scaffold, a sec- Inusual cases, as shown in the drawing, 0nd yoke hung from the shaft andheld 25 the platform 1 of the scaffold is sustained by against endwisemovement thereon by the a hanging bracket formed by a U shaped firstyoke, said second yoke including arms frame 2 on which rests theplatform 1, and preventing endwise movement of the cable through theends of the branches of the frame drums on the shaft, a gear on the drumshaft, is gyratorially mounted a horizontal shaft 3, an operating shaftsupported on the second which serves to bear a hanging bracket at yokeand carrying a worm engaged with the which has two standards for eachend 5 and gear, and means for rotating the operating 5, fastened to theshaft 3, and having seshaft. cured between said standards 5 and 5 the 2.Acable suspended scaffold support comdrums 6 and 7 for the coiling ofthe cables 8 prising a pair of U-shaped frames, a shaft and 9 on whichthe supports are suspended. mounted in each frame, a worm wheel on eachThe elevating mechanism comprisesaworm shaft, a pair of drums on eachshaft upon wheel 10 which is fastened to the shaft 3 and which thesupporting cables are mounted, a which meshes with a screw 11 mounted bebracket suspended from each shaft, a worm tween standards 12 integralwith the brack' mounted in each bracket and meshing with the 40 et 4.worm wheel, a shaft between the worm shafts The shaft of the screw 11projects out-wardand having a universal connection therewith,

ly from one of the standards 12, and secured and means for operating theworms.

to same is the sprocket wheel 13 for the chain 3. A cable suspendedscaffold support com- 14% which operates the raising or lowering ofprising a pair of U-shaped frames, a shaft 45 the scaffold. mounted inthe upper ends of the members of each frame,aworm wheel on each shaft, apair of drums on each shaft, supporting cables on the drums, a bracketsuspended from each shaft, each bracket having pairs of arms, betweeneach pair of which a drum is disposed, a worm wheel mounted in eachbracket, a shaft between the shafts of the worm wheels and havinguniversal connection therewith, a chain wheel on one worm shaft, and achain on said wheel for operating it.

In testimony whereof I have signed my name to this specification.

DR. M. AURELIO SERRA Y PEREZ.

